* {
    margin: 0;
    padding: 0;
}

.button {
    width: 50px;
    height: 50px;
    font-size: 25px;
    margin: 2px;
    cursor: pointer;
    background: #607d8b;
    border: none;
    color: white;
}

.textView {
    width: 210px;
    margin: 5px;
    font-size: 25px;
    padding: 5px;
    border: none;
}

.main {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translateX(-50%) translateY(-50%);
}

html {
    background: linear-gradient(to right, #ff0052, #0072ff);
    height: 100%;
}